NewSecurityBeat

Managing the Mekong: Conflict or Compromise?

At nearly 5,000 kilometers long, the Mekong River is one of Asia’s most strategically important transboundary waterways. In addition to providing water for populations in the highlands of southern China, the Mekong helps support some 60 million people downstream in Southeast Asia, where the river is a key component of agricultural production and economic development.

In recent years, however, the Mekong has emerged as a flashpoint for controversy, pitting China against a coalition of downstream nations that includes Thailand, Laos, Cambodia, and Vietnam. The countries of the Lower Mekong argue that Beijing’s construction of multiple dams on the Upper Mekong is robbing them of critical water resources, by decreasing both the quality and quantity of water that makes it through Chinese floodgates and spillways. China, however, mindful of soaring energy demand at home, has continued its campaign to harness the hydroelectric potential of the Upper Mekong and its tributaries – but at what cost to the environment and Beijing’s relationships with Southeast Asia?

As a result, Beijing has been looking to bolster its energy security by reaching out to develop energy resources in Africa, Latin America, and the Middle East, as well as along the Mekong and in the East and South China Seas.

In that context, China’s aggressive hydroelectric development of the Upper Mekong — known in China as the Láncang Jiang (shown in the boxed area of the map at right) — makes perfect sense. The river’s sizeable elevation drops make it a rich source of energy; already, 15 large-scale dams have either been completed or are under construction on the Upper Mekong in Tibet and Yunnan.

Those dams also provide China with enormous geopolitical leverage over downstream nations. With little more than the flick of a switch, the Chinese government could substantially curtail the volume of flow entering the Lower Mekong basin. Doing so would of course be tantamount to an act of war, since depleted flow volumes in the Lower Mekong would hinder crop irrigation, jeopardize food security, and endanger the health of the region’s economically critical freshwater fisheries, which are among the world’s most productive. Chinese floodgates and spillways essentially give Beijing de facto control over Southeast Asia’s water security.

The View Downstream

To date, China has never threatened to deliberately reduce the flow of the Mekong to its downstream neighbors. Nevertheless, the perception of threat in Southeast Asian capitals remains high.

Already, a number of the region’s governments — represented formally through the Mekong River Commission, a 15-year-old organization that China still has not joined as a full-fledged member — have complained that completed or in-progress Chinese dams are resulting in less water entering their countries, a phenomenon that becomes particularly pronounced during periods of drought, as observed this summer. Further, there is also the issue of water quality. Since Chinese dams trap silt being flushed out of the Himalayas, that nutrient-rich material cannot be carried downstream, where it historically has helped create fertile soils in the floodplains of the Lower Mekong basin.

Quality and quantity concerns aside, there are also structural issues concerning how Beijing goes about its business on the Upper Mekong. Since it is only a “Dialogue Partner” to members of the Mekong River Commission, China is not required to seek approval from downstream nations on hydroelectric development of the river’s Chinese stretch, even though that development has both direct and indirect implications for water security in the Lower Mekong basin. China has even shown a penchant for deliberate secrecy as it develops its stretch of the river, choosing to share a minimal amount of hydrological data with downstream neighbors and typically refraining from even announcing new dam projects.

“The government of Cambodia will be entirely at the mercy of Beijing,” said Wilson Center Scholar and Southeast Asian security expert Marvin Ott. “For Cambodia, the question becomes how they can curry China’s favor so as to avoid coercive use of the Mekong — or find some way of exerting counter-pressure on Beijing.”

Overall, population for mainland Southeast Asia is projected to rise from its current 232 million to 292 million by 2050. This growth will require increased agricultural output across the region and thus increased reliance on the waters of the Lower Mekong. The Lower Mekong nations’ shared dependency on the river and China’s continued unilateralism in the Upper Mekong could have serious repercussions for the region, said Ott:

The security implications could hardly be greater for the downstream states. With the dams, China will have literal control over the river system that is the lifeblood of Laos, Cambodia, and Vietnam. The power this gives China is equivalent to an invasion and occupation of a country by the Chinese army.

Beyond some limited transparency, Beijing also hopes to mitigate concerns about development of the Upper Mekong by offering funding or logistical support for similar large-scale hydroelectric facilities on the Lower Mekong. The move has been largely welcomed by the Mekong River Commission countries, which envision dams of their own generating much-needed energy input for national grids, accelerating continued economic modernization, and enhancing flood control. As of 2009, there were 12 dam projects for stretches of the Mekong south of the Chinese border and many more planned for key tributaries.

The danger in such deal-making is that the environmental costs will be lost in the shuffle. A series of major dams would fundamentally alter the Mekong’s hydrology, which could lead to the degradation of sensitive riverine ecosystems, the disruption of upstream migratory routes for fish that serve as local dietary staples, and the decline of fresh water fisheries that form the backbone of many local economies.

Given the long-term effects on the food, environmental, and economic security of the Lower Mekong heartland, Beijing’s attempt to ease water tensions with a new round of dam construction may end up doing far more harm than good. Unfortunately, with both China and the Mekong River Commission countries currently viewing the dam proposals as something of a win-win, planning and construction are likely to move forward over the coming years.